What is this weird script I found on facebook?

Posted by Mike Turley on Stack Overflow See other posts from Stack Overflow or by Mike Turley
Published on 2010-05-30T16:23:13Z Indexed on 2010/05/30 16:32 UTC
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Not so much a question to help my own programming, but I found this page on facebook with a cool illusion and a page that says "to see the real illusion, copy and paste this code into your address bar" and there is a script: http://pastebin.com/LQUVQ8hm

What the hell is this? What would happen if I put it in my address bar, which I assume would be a very unwise idea?

I am confused.

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